Pyrene-based Schiff Base as Selective Chemosensor for Copper(II) and Sulfide Ions

摘要

abstract_textp1-aminopyrene and 2,4-dihydroxy benzaldehyde derived pyrene based chemosensor was obtained by single step synthesis. The sensor is highly selective and sensitive towards Cu2+ and S2- ions. Sensitivity of the sensor towards Cu2+ was assessed by UV/Visible absorption and emission spectroscopy while the same for the S2- was colorimetrically assessed. Static quenching mechanism for Cu2+ was established by time-resolved fluorescence spectroscopy. Stoichiometry of the sensor with Cu2+ and S2- ions were found to be 2:2 and 1:1 with the corresponding binding constants as 5.65 x10(5)M(-1) and 3.08 x10(4) M-1. The lower limit of detection of Cu2+ and S2- by 1 is 0.503 and 10 mu M respectively projecting the sensor as a potential agent for applications in real samples./p/abstract_text